Peer-reviewed publication
Positron production using a 9 MeV electron linac for the GBAR experiment
Nuclear Instruments and Methods in Physics Research A 985, 164657
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- Date
- 2020-09-16
- Identifier
- 10.1016/j.nima.2020.164657
What it covers
The GBAR slow-positron source: a 9 MeV electron linac that makes positrons by bremsstrahlung pair production, then a tungsten-mesh moderator.
Methods and setup
Staying below 10 MeV avoids lasting activation in the target cave. The published performance is 5×10⁷ slow positrons per second, enough to outrun a conventional radioactive positron source for this experiment.
Why it matters
GBAR’s antihydrogen scheme needs that flux to build a positronium cloud and then an antihydrogen ion. The linac source is the industrial-scale positron plant behind those later detector papers.
Research topics
Antimatter physicsGBARAccelerator technologyCERN